Desk



FIG. 1 is a perspective view taken from the left-front corner and from above of a desk showing my new design;

FIG. 2 is an elevational view taken from the right side thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof; and

FIG. 5 is a rear view thereof. 

The ornamental design for a desk, as shown and described. 